Size Effects on Surface Elastic Waves in a Semi-Infinite Medium with Atomic Defect Generation
The paper investigates small-scale effects on the Rayleigh-type surface wave propagation in an isotopic elastic half-space upon laser irradiation. Based on Eringen’s theory of nonlocal continuum mechanics, the basic equations of wave motion and laser-induced atomic defect dynamics are derived. Dispe...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2013-01-01
|
| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2013/528208 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832555439716302848 |
|---|---|
| author | F. Mirzade |
| author_facet | F. Mirzade |
| author_sort | F. Mirzade |
| collection | DOAJ |
| description | The paper investigates small-scale effects on the Rayleigh-type surface wave propagation in an isotopic elastic half-space upon laser irradiation. Based on Eringen’s theory of nonlocal continuum mechanics, the basic equations of wave motion and laser-induced atomic defect dynamics are derived. Dispersion equation that governs the Rayleigh surface waves in the considered medium is derived and analyzed. Explicit expressions for phase velocity and attenuation (amplification) coefficients which characterize surface waves are obtained. It is shown that if the generation rate is above the critical value, due to concentration-elastic instability, nanometer sized ordered concentration-strain structures on the surface or volume of solids arise. The spatial scale of these structures is proportional to the characteristic length of defect-atom interaction and increases with the increase of the temperature of the medium. The critical value of the pump parameter is directly proportional to recombination rate and inversely proportional to deformational potentials of defects. |
| format | Article |
| id | doaj-art-0073a5cb6df2411aa141ec9ca64cd2df |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-0073a5cb6df2411aa141ec9ca64cd2df2025-02-03T05:48:15ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242013-01-01201310.1155/2013/528208528208Size Effects on Surface Elastic Waves in a Semi-Infinite Medium with Atomic Defect GenerationF. Mirzade0Institute on Laser and Information Technologies, Russian Academy of Sciences, Moscow 140700, RussiaThe paper investigates small-scale effects on the Rayleigh-type surface wave propagation in an isotopic elastic half-space upon laser irradiation. Based on Eringen’s theory of nonlocal continuum mechanics, the basic equations of wave motion and laser-induced atomic defect dynamics are derived. Dispersion equation that governs the Rayleigh surface waves in the considered medium is derived and analyzed. Explicit expressions for phase velocity and attenuation (amplification) coefficients which characterize surface waves are obtained. It is shown that if the generation rate is above the critical value, due to concentration-elastic instability, nanometer sized ordered concentration-strain structures on the surface or volume of solids arise. The spatial scale of these structures is proportional to the characteristic length of defect-atom interaction and increases with the increase of the temperature of the medium. The critical value of the pump parameter is directly proportional to recombination rate and inversely proportional to deformational potentials of defects.http://dx.doi.org/10.1155/2013/528208 |
| spellingShingle | F. Mirzade Size Effects on Surface Elastic Waves in a Semi-Infinite Medium with Atomic Defect Generation Advances in Condensed Matter Physics |
| title | Size Effects on Surface Elastic Waves in a Semi-Infinite Medium with Atomic Defect Generation |
| title_full | Size Effects on Surface Elastic Waves in a Semi-Infinite Medium with Atomic Defect Generation |
| title_fullStr | Size Effects on Surface Elastic Waves in a Semi-Infinite Medium with Atomic Defect Generation |
| title_full_unstemmed | Size Effects on Surface Elastic Waves in a Semi-Infinite Medium with Atomic Defect Generation |
| title_short | Size Effects on Surface Elastic Waves in a Semi-Infinite Medium with Atomic Defect Generation |
| title_sort | size effects on surface elastic waves in a semi infinite medium with atomic defect generation |
| url | http://dx.doi.org/10.1155/2013/528208 |
| work_keys_str_mv | AT fmirzade sizeeffectsonsurfaceelasticwavesinasemiinfinitemediumwithatomicdefectgeneration |